“In a post-Facebook world, we have decided to eliminate some positions that are no longer core to our company’s long-term mission,” SecondMarket said in an email. The company said it has no additional planned layoffs, will continue to hire in “select areas” and aims to increase headcount in the future.

SecondMarket had about 150 employees prior to the reductions.

Facebook’s long-awaited decision to go public means private exchanges like SecondMarket and SharesPost stand to lose a big chunk of business.

Representatives from SharesPost weren’t immediately available for comment.

Private exchanges have benefited in recent years as more companies have waited longer before going public. Start-up employees and accredited investors have aimed to capitalize on big-name tech companies before they hit the public markets. Tech darlings, such as LinkedIn, Groupon and Zynga, attracted plenty of demand in the private markets before their IPOs last year.

But critics have questioned the long-term sustainability of these private-market platforms, especially since the pipeline of companies beyond Facebook appears to be thin.